KR100448689B1 - Non blot type lock manhole cover - Google Patents

Abstract

PURPOSE: A boltless locking manhole lid is provided to facilitate fixing and unfixing by installing a locking assembly having a slant face to the manhole to prevent separation of the manhole lid. CONSTITUTION: A boltless locking manhole lid is installed to a manhole frame having a seating protrusion. A stop groove is formed along the bottom part of the seating protrusion. Plural insertion holes in which a locking assembly is inserted are formed to the manhole lid. In the locking assembly, a tightening unit(32) is formed to the upper part of a circular fitting plate(31) and a central rod(33) of a cylinder shape is formed to the lower part of the circular fitting plate. A packing rubber(34) is inserted in the central rod and is fitted to the circular fitting plate. A fixing unit(35) to which two slant faces are formed symmetrically around a stop projection(37) is inserted in the central rod. When the locking assembly is rotated, the slant faces of the fixing unit are fitted to the bottom part of the seating protrusion and the stop projection of the fixing unit is inserted in the stop groove of the seating protrusion.

Description

Non blot type lock manhole cover}

The present invention is to prevent the manhole cover 10 is separated from the manhole frame 20 by the external impact, more specifically, the locking bolt 40 in fixing the manhole cover 10 to the manhole frame 20 No bolt lock manhole cover that can prevent the manhole cover 10 from being separated by a strong external impact by using a lock bundle 30 that can be rotated 360 ° in either the left or right direction without using will be.

Manholes are divided into water, sewage, rainwater, sewage, and telecommunications according to their purpose, and are installed at regular intervals on roadways or sidewalks, and maintain water, sewer, storm, sewage, and telecommunication pipes underground. For the structure.

At the top of the manhole is a manhole cover formed of castings to allow entry and exit for maintenance of underground burial.

The manhole cover 10 was randomly separated or made of a heavy weight of steel in order to prevent a strong impact from the outside, that is, the high-speed running of large trucks, but nevertheless, the accident is frequently released from Figure 6 Manhole cover 10 has been proposed that can be fastened using the locking bolt 40 as shown.

However, the locking bolt 40 fastening manhole cover 10 is buried underground as foreign matter gets stuck or rusts on the threads of the locking bolts 40 for a long time, and the threads are fixed and broken, thus losing the function of the locking bolts 40. In opening and closing the manhole cover 10 for maintenance, problems such as delay in working time and replacement of the lock bolt 40 occur.

Therefore, the present invention has been made in view of the above problems, the main object of the bolt-free to facilitate the locking and unlocking by installing a lock bunch having an inclined surface on the manhole cover to prevent the separation of the manhole cover It is intended to provide a locking manhole cover.

1 is an exploded perspective view of the present invention

2 is an exploded perspective view of the lock bundle

3 is a front view of the lock bundle

Figure 4 is a perspective view showing the principle of fastening the lock

5 is an enlarged cross-sectional view taken along the line A-A of FIG.

6 is a perspective view of a manhole cover to which a conventional locking bolt is applied

<Description of Symbols for Major Parts of Drawings>

10: manhole cover

11: insertion hole

20: manhole frame

21: inner jaw

22: stop groove

30: bundle of locks

31: mounting plate

32: diaphragm

33: center rod

33a: cutting surface

34: packing rubber

35: ruled ball

36: slope

37: stopper

38: Fixing bolt

40: lock bolt

Bolt-free locking manhole cover according to the present invention for achieving the above object, a plurality of insertion holes 11 are formed so that the lock bunch 30 can be inserted into the manhole cover 10, the manhole frame 20 A stop groove 22 is formed along the bottom portion of the bottom portion of the settle 21 formed in the bottom portion.

Hereinafter, with reference to the accompanying drawings the technical configuration and effects of a preferred embodiment which can achieve the object of the present invention will be described.

1 is an exploded perspective view of the present invention, Figure 2 is an exploded perspective view of the lock bundle, Figure 3 is a front view of the lock bundle.

As shown in FIG. 1, the manhole cover 10 has a plurality of insertion holes 11 formed therein so that the lock bunch 30 is inserted to rotate left and right, and the manhole cover 10 is formed inside the manhole frame 20. ), A settling jaw 21 can be formed. The number of the insertion holes 11 is preferably three or four.

As shown in FIGS. 2 and 3, the lock bundle 30 has a fastener 32 for rotating the lock bundle 30 on the upper portion of the circular attachment plate 31 having a predetermined thickness, and the attachment plate ( 31 is formed at the lower portion of the cylindrical center bar 33, the cutting surface 33a of a predetermined length along the axial direction is machined on both symmetrical sides of the center bar (33).

The center rod 33 is inserted in the packing rubber 34 excellent in close contact and elastic force is attached to the attachment plate 31 and then the fastener 35 is inserted and fixed.

The ruler 35 is fixed to the left and right rotation by using the fixing bolt 38 to the cutting surface 33a of the central rod 33, as shown in Figures 2 and 3, the inclined surface 36 is The stopper 37 is formed to be symmetrical and at the apex where two inclined surfaces 36 meet.

The stop protrusion 37 is inserted into the stop groove 22 formed along the bottom surface of the settling jaw 21 of the manhole frame 20 shown in FIG. 4 when the lock bundle 30 is rotated, the lock bundle 30. ) To stop the rotation.

Hereinafter, the fastening principle of the bolt-free manhole cover according to the present invention will be described.

4 is a perspective view illustrating a fastening principle of the lock bunch, and FIG. 5 is an enlarged sectional view taken along line AA of FIG. 4.

As shown in FIG. 4, the manhole cover 10 is placed on the settling jaw 21 of the manhole frame 20, and the lock bunch 30 is inserted into the insertion hole 11 of the manhole cover 10.

The lock bunch 30 is rotated and fastened as shown in the enlarged view of the circle of FIG. 4, and the inclined surface 36 of the ruler 35 is caught on the bottom of the settling jaw 21 during the initial rotation, and the rotation is continued. When the rubber packing is contracted and the adhesion force is increased along the inclined surface 36, the rubber packing is fixed to the bottom surface of the settling jaw 21. At this time, the stop protrusion 37 of the ruler 35 is inserted into the stop groove 22 of the settled jaw 21 and is fixed in a state of maintaining maximum adhesion.

The lock bunch 30 is rotated in the clockwise direction like the conventional lock bolt 40, and swung and unlocked by rotating in a counterclockwise direction, and rotated in a counterclockwise direction. In the 40, the foreign matter is stuck or damaged in the thread, and the thread is fixed and broken, and thus the function of the lock bolt 40 is lost. It is not there.

FIG. 5 is an enlarged sectional view taken along line AA of FIG. 4, and illustrates a state in which the stop protrusions 37 of the lock bundle 30 are inserted into the stop grooves 22 of the settlement 21.

As described above, although the preferred embodiment according to the present invention has been illustrated and described, the present invention is not limited to the above-described embodiment and the general knowledge of the technical field to which the present invention pertains without departing from the technical spirit of the present invention. Various changes and modifications are possible by those who have.

As described above, a boltless lock manhole cover with an inclined surface and a left and right 360 ° rotatable lock assembly installed to prevent detachment of the manhole cover is locked due to foreign matter being caught or rusted in the thread when the lock bolt is conventionally tightened. As the bolt is fixed and damaged, the function of the lock bolt is lost, opening and closing the manhole cover for maintenance of underground buried material, it is possible to overcome the conventional problems such as delay of work time and replacement of the lock bolt. Due to the configuration of the manhole cover, which is made of heavy materials, with a locking bundle having a locking function, the manhole cover is lighter, thereby reducing raw materials.

Claims (1)

In the manhole cover that installs and fastens the manhole cover 10 to the manhole frame 20 in which the settling jaw 21 is formed, A stop groove 22 is formed along the bottom portion of the bottom portion of the settling jaw 21, The manhole cover 10 is formed with a plurality of insertion holes 11 that can be inserted into the lock bunch 30, The lock bunch 30 is a fastener 32 is formed on the upper portion of the circular attachment plate 31 of a predetermined thickness, the central rod 33 of the cylindrical shape is formed at the lower portion of the attachment plate 31, the center rod ( 33, a packing rubber 34 is inserted and attached to the attachment plate 31, and the center bar 33 has a ruler 35 formed so that two inclined surfaces 36 are symmetric about the stopper 37. Inserted and fixed, when the lock bunch 30 is rotated while the inclined surface 36 of the ruler (35) is caught by the bottom portion of the settled jaw 21 is increased as the adhesion increases, the stopper (37) of the ruler (35) Bolt-free manhole cover, characterized in that the insert is fixed to the stop groove (22) of the lining jaw (21).